This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A080985 #8 Apr 09 2014 10:13:01 %S A080985 1,3,33,4785,118289985,83574429584465985, %T A080985 47533348097639173195113266868291585, %U A080985 17303590888755815609063515462865866934559547198082397287546077959536385 %N A080985 Define b by b(1) = 1 and for n>1, b(n) = b(n-1)+1/(2+1/b(n-1)); sequence gives denominator of b(n). %C A080985 Suggested by _Leroy Quet_, Feb 26 2003. %F A080985 See under A080984. %e A080985 See under A080984. %o A080985 Reduce: See under A080984. %Y A080985 Cf. A080984, A080986, A080987, A079269, A079278. %K A080985 frac,nonn %O A080985 1,2 %A A080985 _Hugo Pfoertner_, Feb 26 2003